clear L2Arc ?

[Janko]

Hi,

how can i clear the L2Arc Cache?

Thanks a lot.

 

[HoneyBadger]

Easiest ways are:

1. Reboot, if you haven't set it to be persistent.
2. Remove the L2ARC device(s) from the pool and re-add them.

Counter-question: Why? If it's for benchmarking, setting secondarycache=none on the dataset/zvol in question is faster.

 

[Janko]

Thanks for Reply.
Both Options not possible at the Moment.
Its an active VM Storage.

We had some performance Issues and i saw the NAS-106992 Entry.

 

[HoneyBadger]

Have you set the tunable for pL2ARC (vfs.zfs.l2arc.rebuild_enabled)? Bug seems to refer to delay/middleware UI timeouts when reindexing a large L2ARC.

Its an active VM Storage.

We had some performance Issues

Are you using iSCSI? Can you elaborate further on the performance issues?